-
公开(公告)号：US06242884B1
公开(公告)日：2001-06-05
申请号：US09274164
申请日：1999-03-22
IPC分类号： H02P528
CPC分类号： H02K16/04 , H02K17/12 , H02P1/34 , H02P3/18 , H02P21/34 , H02P21/36 , H02P2207/073 , H02P2207/076
摘要： A dual stator winding induction machine has two windings with input terminals which are supplied separately with drive power. The two stator windings have a different number of poles to essentially eliminate the magnetic coupling between the two windings and to decouple the torques produced by each set of windings. Power is supplied to the two windings by two separate variable frequency inverter drives to provide two independently controllably torque components. At low speed, the power supplied to one of the windings can produce torque which opposes the torque from the power applied to the other winding, so that very low speed and standstill operation can be achieved while the frequency of the power supplied by the inverters is always greater than the minimum frequency. At higher operating speeds, power is supplied to the two windings so that the torque from the windings adds. The dual stator machine can be built with minimal modifications to standard winding configurations.
摘要翻译： 双定子绕组感应电机具有两个带有输入端子的绕组，输入端子单独提供驱动电源。 两个定子绕组具有不同数量的极点，以基本上消除两个绕组之间的磁耦合，并且去耦合每组绕组产生的转矩。 通过两个单独的变频驱动器向两个绕组供电，以提供两个可独立控制的扭矩组件。 在低速时，提供给一个绕组的电力可以产生与施加到另一个绕组的功率的扭矩相反的扭矩，从而可以实现非常低的速度和停止操作，而逆变器提供的功率的频率为 始终大于最小频率。 在较高的运行速度下，向两个绕组供电，这样绕组的转矩就会增加。 双定子电机可以对标准绕组配置进行最小的修改。
-
公开(公告)号：US20120086381A1
公开(公告)日：2012-04-12
申请号：US12901634
申请日：2010-10-11
申请人： Thomas A. Lipo
发明人： Thomas A. Lipo
IPC分类号： H02P23/00
CPC分类号： H02P23/0077
摘要： A brushless, synchronous machine is provided. A brushless, synchronous motor includes a rotor, a stator extending around at least a portion of the rotor and separated from the rotor by an air gap, a first stator winding, a second stator winding, a third stator winding, a drive circuit, a first rotor winding, a second rotor winding, and a diode bridge. The first stator winding, the second stator winding, and the third stator winding are mounted to the stator to generate square waves. The drive circuit is configured to provide a current to the first stator winding, the second stator winding, and the third stator winding, wherein the current includes an alternating current (AC) component and a direct current (DC) component. The first rotor winding is mounted to the rotor to form a plurality of third harmonic coils. The second rotor winding is mounted to the rotor. The generated square waves induce a voltage in the first rotor winding that is applied to the second rotor winding to create a brushless, synchronous motor. The diode bridge is mounted to the rotor to rectify the voltage induced in the first rotor winding and to apply the resulting DC voltage to the second rotor winding.
摘要翻译： 提供无刷同步电机。 无刷同步电动机包括转子，绕转子的至少一部分延伸并且通过气隙与转子隔开的定子，第一定子绕组，第二定子绕组，第三定子绕组，驱动电路， 第一转子绕组，第二转子绕组和二极管桥。 第一定子绕组，第二定子绕组和第三定子绕组安装到定子以产生方波。 驱动电路被配置为向第一定子绕组，第二定子绕组和第三定子绕组提供电流，其中电流包括交流（AC）分量和直流（DC）分量。 第一转子绕组安装到转子以形成多个三次谐波线圈。 第二转子绕组安装到转子上。 产生的方波在第一转子绕组中产生施加到第二转子绕组上的电压，以产生无刷同步电动机。 二极管桥安装到转子上，以对第一转子绕组中感应的电压进行整流，并将所得的直流电压施加到第二转子绕组。
-
公开(公告)号：US06995992B2
公开(公告)日：2006-02-07
申请号：US10601061
申请日：2003-06-20
申请人： Lixiang Wei , Thomas A. Lipo
发明人： Lixiang Wei , Thomas A. Lipo
CPC分类号： H02M5/4585
摘要： A dual bridge matrix converter has a line-side converter with controllable switches that receives AC power and provides unidirectional power to high and low DC link lines, and a load-side converter which receives the power from the DC link lines and provides AC power to output lines. A clamp circuit is connected across the DC link lines and includes a series connected diode and a capacitor. Negative DC link current will be conducted through the clamp diode to charge the clamp capacitor to avoid voltage spikes on the DC link lines. A controllable switch may be connected in parallel with the clamp diode and is turned on when the voltage across the clamp capacitor is above a threshold that is greater than the normal peak-to-peak AC input voltage. The switch is turned off when the voltage across the clamp capacitor is lower than the threshold voltage.
摘要翻译： 双桥矩阵转换器具有可控开关的线路侧转换器，其接收AC电力并向高和低DC链路线路提供单向电力;以及负载侧转换器，其从DC链路线路接收电力并提供AC电力 输出线。 一个钳位电路连接在直流母线上，并包括一个串联的二极管和一个电容器。 负直流链路电流将通过钳位二极管进行充电，以对钳位电容充电，以避免直流母线上的电压尖峰。 可控开关可以与钳位二极管并联连接，并且当钳位电容器两端的电压高于大于正常峰 - 峰交流输入电压的阈值时导通。 当钳位电容器两端的电压低于阈值电压时，开关被关闭。
-
公开(公告)号：US5510689A
公开(公告)日：1996-04-23
申请号：US171565
申请日：1993-12-21
申请人： Thomas A. Lipo , Julio C. Moreira
发明人： Thomas A. Lipo , Julio C. Moreira
CPC分类号： H02P21/141 , H02P21/18 , H02P6/187
摘要： Methods and apparatus are provided wherein air gap fundamental flux magnitude and relative position are determined from stator voltage third harmonic components and stator current in operating alternating current machines having a stator, a rotor and an air gap therebetween. Such determinations have various uses, such as for efficiency control.
摘要翻译： 提供了方法和装置，其中在具有定子，转子和它们之间的空气间隙的操作交流电机中，从定子电压三次谐波分量和定子电流确定气隙基本通量幅度和相对位置。 这种确定具有各种用途，例如用于效率控制。
-
5.发明授权Doubly salient permanent magnet machine with field weakening (or boosting) capability 失效具有弱磁（或升压）能力的双凸极永磁机
公开(公告)号：US5825113A
公开(公告)日：1998-10-20
申请号：US498194
申请日：1995-07-05
申请人： Thomas A. Lipo , Yue Li
发明人： Thomas A. Lipo , Yue Li
CPC分类号： H02P9/40 , H02K21/44 , H02P25/092
摘要： A permanent magnet machine combines both principles of variable reluctance machines and permanent magnets, and comprises a rotor with salient rotor poles and a stator with salient stator poles. A pair of ferrite arched permanent magnets are embedded in the stator yoke beneath respective stator poles and are arranged symmetrically around the central axis of the machine. A field winding for boosting or weakening the primary flux generated by the permanent magnets is wound in a special arrangement.
摘要翻译： 永磁电机结合了可变磁阻机和永磁体的原理，并且包括具有凸极转子极的转子和具有凸极定子极的定子。 一对铁氧体弧形永久磁铁嵌在定子磁轭的相应定子极下方，围绕机器的中心轴线对称设置。 用于增强或削弱由永磁体产生的主要磁通的励磁绕组以特殊的布置被缠绕。
-
6.发明授权
公开(公告)号：US5272429A
公开(公告)日：1993-12-21
申请号：US591517
申请日：1990-10-01
申请人： Thomas A. Lipo , Julio C. Moreira
发明人： Thomas A. Lipo , Julio C. Moreira
CPC分类号： H02P21/141 , H02P21/18 , H02P6/187
摘要： Methods and apparatus are provided wherein air gap flux magnitude and relative position are determined from stator voltage harmonic components and stator current in operating alternating current machines having a stator, a rotor and an air gap therebetween. Such determinations have various uses, such as for efficiency control. Various new and improved efficiency controllers are provided which utilize these measurements.
摘要翻译： 提供了一种方法和装置，其中，在具有定子，转子和它们之间的气隙的操作交流电机中，从定子电压谐波分量和定子电流确定气隙磁通量和相对位置。 这种确定具有各种用途，例如用于效率控制。 提供了利用这些测量的各种新的和改进的效率控制器。
-
公开(公告)号：US4455522A
公开(公告)日：1984-06-19
申请号：US404252
申请日：1982-08-02
申请人： Thomas A. Lipo
发明人： Thomas A. Lipo
CPC分类号： H02P27/048 , H02P2207/01
摘要： A drive system for a polyphase induction motor for extending the range of high frequency operation has two current source inverters connected to the polyphase motor to supply power to the motor. Motor speed and motor load are sensed and a circuit responsive to increasing motor speed and decreasing motor loads advances the firing pulses of one inverter while delaying the firing pulses of the other inverter. The advance in firing of one inverter and the delay in firing the other, reduces the effective current supplied to the motor while not decreasing the current available in each inverter for commutation.
摘要翻译： 用于延长高频操作范围的多相感应电动机的驱动系统具有连接到多相电动机以向电动机供电的两个电流源逆变器。 检测电动机速度和电动机负载，并且响应于增加电动机速度和减少电动机负载的电路使得一个逆变器的点火脉冲延迟另一个逆变器的点火脉冲。 一个逆变器的点火提前和另一个逆变器的延迟，减少了提供给电机的有效电流，同时不减少每个逆变器中可用的换向电流。
-
8.发明授权
公开(公告)号：US4112339A
公开(公告)日：1978-09-05
申请号：US817625
申请日：1977-07-21
申请人： Thomas A. Lipo
发明人： Thomas A. Lipo
CPC分类号： H02P23/06
摘要： A method and circuit for calculating the instantaneous pulsating component of torque for use as a cogging feedback signal to stabilize ac motors at low frequencies. An air gap flux signal is generated by integrating the instantaneous voltage across a stator phase winding during the interval the current in that winding is zero. Pulsating torque is the product of the high pass filtered flux signal and the inverter input or dc link current.
摘要翻译： {PG，1一种用于计算扭矩的瞬时脉动分量的方法和电路，用作齿槽反馈信号以在低频下稳定交流电动机。 通过在该绕组中的电流为零的间隔期间对定子相绕组之间的瞬时电压进行积分来产生气隙磁通信号。 脉冲扭矩是高通滤波通量信号和逆变器输入或直流链路电流的乘积。
-
公开(公告)号：US4088934A
公开(公告)日：1978-05-09
申请号：US729042
申请日：1976-10-04
CPC分类号： B60L15/025 , B60L11/1803 , H02P27/048 , H02P27/047 , Y02T10/643 , Y02T10/7005
摘要： For use with an adjustable speed a-c electric motor having a stator adapted to be coupled to a source of variable frequency excitation and a rotor in which torque is developed when the motor is excited, the strength of said torque being dependent on interacting current and flux in the motor, a scheme is provided that comprises means for deriving an angle feedback signal representative of the actual phase angle between the aforesaid current and flux and means responsive to said angle feedback signal for controlling the source of variable frequency excitation so as to control the frequency of stator excitation as a function of the angle feedback signal.
摘要翻译： 对于具有适于耦合到可变频率励磁源的定子的可调速交流电动马达和在电动机被激励时产生转矩的转子，所述转矩的强度取决于相互作用的电流和通量 电动机提供了一种方案，其包括用于导出代表上述电流和磁通之间的实际相位角的角度反馈信号的装置，以及响应于所述角度反馈信号的装置，用于控制可变频率激励源，以便控制频率 定子励磁作为角度反馈信号的函数。
-
公开(公告)号：US07006366B2
公开(公告)日：2006-02-28
申请号：US10865043
申请日：2004-06-10
申请人： Debiprasad Panda , Thomas A. Lipo
发明人： Debiprasad Panda , Thomas A. Lipo
IPC分类号： H02M7/217
CPC分类号： H02M1/4216 , H02M7/219 , H02M2001/0077 , Y02B70/126
摘要： A rectifier has two half-controlled bridge rectifiers which are connected in parallel to provide DC power to DC bus lines. Each bridge rectifier receives AC power through inductances such as series inductors or an isolation transformer with a single primary and two secondaries. Each bridge rectifier has a full bridge of diodes, with active switching devices connected in parallel with half of the diodes in the bridge. The switching devices can be controlled to provide unity power factor at the AC input lines, allowing lower rated diodes and switching devices to be used.
摘要翻译： 整流器具有两个并联连接的半控桥式整流器，以向直流母线提供直流电力。 每个桥式整流器通过诸如串联电感器的电感器或具有单个初级和次级二次的隔离变压器来接收AC电力。 每个桥式整流器具有全桥二极管，有源开关器件与桥中的二极管的一半并联连接。 可以控制开关器件，以提供交流输入线上的单位功率因数，从而允许使用较低额定二极管和开关器件。
-
-
-
-
-
-
-
-
-
搜索结果
43 条记录 (耗时 0.023 秒)
